Lockout Verification First Pass Rate Calculator

Use one process, asset or item scope, reporting period, cutoff, measurement unit, and written classification rule across both values. Every isolation point uses the current procedure, test method, identity rule, and first-attempt definition. Corrections, duplicates, exclusions, reopened records, and late evidence follow one documented treatment. Reconcile the numerator to the eligible denominator rather than combining separately filtered reports. A changed population can move the percentage even when underlying operations did not change.

This is observed first-check incidence, not proof of isolation adequacy, procedure validity, worker protection, or equipment safety. Compare periods or targets prepared from the same rules, not an assumed universal benchmark. Product mix, sampling, schedule changes, reporting delay, exclusions, automation, and event granularity can move the value. Review absolute observations and reason-level evidence beside the percentage before deciding on corrective work.

No. This calculator applies disclosed arithmetic to values you supply; it is not an audit, quality release, maintenance authorization, supplier ruling, forecast, or process certification. This calculator never authorizes lockout, energization, work, or return to service; competent site verification remains mandatory. Retain source records, version the metric definition, test late-arriving events, and obtain accountable review before using the result for incentives, acceptance, or contractual action.